The act of upending one's drink onto another's head, the inverted cup appearing to be a party hat.
Joe: Did you see Grant hitting on Nicole last night?
Mike: Yeah, but his girl saw and definitely gave him a party-hat.
Joe: LOL
by SounD January 30, 2014
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When you get shit all over your dick, in the shape of a hat, after pounding your partner in the ass.
After a long night banging your mom in the ass, I walked away with a chocolate party hat.
by Itsmegod June 01, 2012
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When you have shit on your lip after eating ass, you strap a dildo to your head and the girl rides it while giving you and handjob.
Babe, can we try the Hitler Party Hat tonight?
by Cricket731 March 01, 2021
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